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This is an acronym originating in the Middletown, OH region. The acronym is based on the following: "Worst Sex I Ever Had. aka WSIEH.

Normally this term does not apply to sex where a sexually transmitted disease was newly obtained by one of the participants in the sex - but it could.

In casual conversation, WSIEH is normally also written in all upper-case letters signifying an over-exaggerated emphasis on this acronym carrying heavy importance.
She continued to cry during sex and ask me to stop, then start again. It was the WSIEH.
by ToddMcIntosh October 09, 2010